Mqtt notes
From Wiki at Neela Nurseries
# https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/samples/net/mqtt_publisher/README.html # https://www.hivemq.com/blog/mqtt-essentials-part2-publish-subscribe/ # https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/samples/index.html # https://www.circuito.io/blog/arduino-code/ # https://www.hivemq.com/blog/mqtt-essentials-part-7-persistent-session-queuing-messages/ # https://www.hivemq.com/blog/mqtt-essentials-part-3-client-broker-connection-establishment/
